3.7.3.3 Model resolution

There is a high level of confidence in the ability of the Assessment to rule out areas that are not subject to hydrological change. This is due to the ability of the OGIA model to reflect broad-scale hydrological changes related to impacts that may accumulate from multiple sites and types of coal resource development. Where changes are predicted, and particularly close to the mine or CSG operations, the Assessment team is confident in asserting that hydrological changes may occur, but less confident in the precise magnitude or extent of propagation of those changes from depth to the surface. The underlying spatial resolution for the impact and risk analysis in this Assessment is 2.25 km². Although fit for purpose, a finer-resolution model would be more suitable for local-scale analysis.